CN218294887U - High pressure pipeline inside lining HDPE flange connecting device - Google Patents
High pressure pipeline inside lining HDPE flange connecting device Download PDFInfo
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- CN218294887U CN218294887U CN202221525929.2U CN202221525929U CN218294887U CN 218294887 U CN218294887 U CN 218294887U CN 202221525929 U CN202221525929 U CN 202221525929U CN 218294887 U CN218294887 U CN 218294887U
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- hdpe
- flange
- carbon steel
- pipeline
- lining
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Abstract
The utility model relates to a high-pressure pipeline lining HDPE flange connecting device, which comprises a carbon steel pipeline (1), a lining HDPE pipeline (2), a carbon steel flange, an HDPE flange (4) and a metal ring gasket (5); a carbon steel flange is welded at a breakpoint of the carbon steel pipeline (1), the lining HDPE pipeline (2) is inserted into the carbon steel pipeline (1) through reducing, and the HDPE flange (4) is connected with the end part of the lining HDPE pipeline (2); and a metal ring gasket (5) is arranged on the end surface of the carbon steel flange, two adjacent carbon steel flanges are screwed down through a fastener (6), and the metal ring gasket (5) is attached to the outer circumference of the HDPE flange (4). The utility model discloses an adopt standard RJ steel flange, then according to its structure and inside lining technology, select suitable HDPE flange etc. can bear the high pressure more than 20MPa, connect the succinct economy of material, convenient operation has very strong suitability.
Description
Technical Field
The utility model belongs to the technical field of the defeated technique of oil gas collection, concretely relates to high-pressure pipeline inside lining HDPE flange connecting device for the construction of new pipeline and the restoration of old pipeline.
Background
In the oil-gas field development process, oil-gas water is usually collected and transported by a carbon steel pipeline, and along with the continuous improvement of salt content, water content, H2S and CO2 content, the traditional carbon steel or stainless steel pipeline is easily corroded, so that the pipeline leakage is caused, and the service life of the pipeline is shortened.
The HDPE (high density polyethylene) material has the advantages of excellent chemical property, small frictional resistance, good wear resistance and the like, and the HDPE lining technology can well solve the problem of corrosion and leakage of the carbon steel pipeline. HDPE pipeline external diameter is slightly greater than the internal diameter of steel pipe, and inside inserting the steel pipe through the compression undergauge, influenced by frictional force such as pipeline elbow, the inside lining work need be gone on in segments, and middle disconnection point need pass through flange joint, therefore disconnection point department flange joint's quality is influencing the quality of HDPE inside lining result. Especially for high-pressure pipelines of more than 20Mpa, the sealing reliability requirement is higher.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high pressure pipeline inside lining HDPE flange joint device, the technical problem who solves is: the breakpoint connection problem of the high-pressure pipeline anticorrosion liner HDPE pipe.
In order to solve the technical problem, the utility model provides a high pressure pipeline inside lining HDPE flange connecting device, its characterized in that: the pipe comprises a carbon steel pipeline 1, a lining HDPE pipeline 2, a carbon steel flange, an HDPE flange 4 and a metal ring gasket 5; a carbon steel flange is welded at a breakpoint of the carbon steel pipeline 1, the lining HDPE pipeline 2 is inserted into the carbon steel pipeline 1 through reducing, and the HDPE flange 4 is connected with the end part of the lining HDPE pipeline 2; and a metal ring gasket 5 is arranged on the end surface of the carbon steel flange, two adjacent carbon steel flanges are screwed through a fastener 6, and the metal ring gasket 5 is attached to the outer circumference of the HDPE flange 4.
Has the advantages that: the utility model discloses an adopt standard RJ steel flange, then according to its structure and inside lining technology, select suitable HDPE flange etc. can bear the high pressure more than 20MPa, connect the succinct economy of material, convenient operation has very strong suitability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. carbon steel pipeline 2, inside lining HDPE pipeline 3, carbon steel flange (RJ) 4, HDPE flange 5, metal ring gasket 6, fastener 7, relief port.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following description will be made in further detail with respect to the embodiments of the present invention.
The utility model provides a high-pressure pipeline lining HDPE flange connecting device, which comprises a carbon steel pipeline 1, a lining HDPE pipeline 2, a carbon steel flange 3, an HDPE flange 4 and a metal ring gasket 5; the lining HDPE pipeline 2 is arranged in the carbon steel pipeline 1,
the carbon steel pipeline 1 is lined with the HDPE pipeline 2 to improve the corrosion resistance and prolong the service life of the pipeline.
A carbon steel flange 3 is welded at a breakpoint of the carbon steel pipeline 1, the lining HDPE pipeline 2 is inserted into the carbon steel pipeline 1 through reducing, and then the HDPE flange 4 is connected with the end part of the carbon steel pipeline through thermal fusion; a metal ring gasket 5 is arranged on the carbon steel flange 3 and is screwed by a fastener 6, and air between two layers of pipelines is exhausted through an air outlet 7 on the carbon steel pipeline 1.
And a thread loosening ring is arranged on the air release port.
The carbon steel flange 3 is a standard RJ face flange and does not need to be specially processed for the HDPE lining. HDPE flange 4 receives inside lining HDPE pipe 2's contractile force to draw to carbon steel flange 3 to closely laminate with it, for preventing fish tail HDPE flange 4, the contact angle position of two flanges carries out the radius angle and handles.
The sealing surface of the HDPE flange 4 has 3-5 circles of waterlines, the thickness of the adjacent 2 HDPE flanges 4 is 1-2mm larger than the width of the metal ring gasket 5 after the fastener 6 is screwed, and a space which is not more than 1mm is reserved between the outer diameter of the HDPE flange 4 and the inner diameter of the metal ring gasket 5.
The metal ring gasket 5 can be oval or octagonal, is tightly attached to the sealing groove of the carbon steel flange 3 under the action of the fastener 6, and is tightly attached to the HDPE flange 4 deformed under pressure to play a role in limiting protection.
In order to prevent the HDPE pipelines with the linings from collapsing due to the existence of air between the HDPE pipelines 2 with the linings and the carbon steel pipelines 1 after rebounding, 2-3 mm vent holes are formed in the carbon steel pipelines, thread loosening rings are welded outside the carbon steel pipelines, and the carbon steel pipelines are externally connected with vent valves or screwed plugs.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides a high pressure pipeline inside lining HDPE flange joint device which characterized in that: the pipe comprises a carbon steel pipeline (1), a lining HDPE pipeline (2), a carbon steel flange, an HDPE flange (4) and a metal ring gasket (5); a carbon steel flange is welded at a breakpoint of the carbon steel pipeline (1), the lining HDPE pipeline (2) is inserted into the carbon steel pipeline (1) through reducing, and the HDPE flange (4) is connected with the end part of the lining HDPE pipeline (2); and a metal ring gasket (5) is arranged on the end surface of the carbon steel flange, two adjacent carbon steel flanges are screwed down through a fastener (6), and the metal ring gasket (5) is attached to the outer circumference of the HDPE flange (4).
2. The high-pressure pipe liner HDPE flange connection device of claim 1, wherein: the carbon steel pipeline (1) is provided with an air release opening (7).
3. The high-pressure pipe liner HDPE flange connection device of claim 1, wherein: the HDPE flange (4) is connected with the end part of the lining HDPE pipeline through thermal welding.
4. The high-pressure pipe liner HDPE flange connection device of claim 2, wherein: and a thread loosening ring is arranged on the air release port.
5. The high-pressure pipe liner HDPE flange connection device of claim 1, wherein: the carbon steel flange (3) is an RJ face flange.
6. The high-pressure pipe liner HDPE flange connection device of claim 1, wherein: the sealing surface of the HDPE flange (4) is provided with 3-5 circles of waterlines.
7. The high-pressure pipe liner HDPE flange connection device of claim 1, wherein: the thickness of the adjacent 2 HDPE flanges (4) is 1-2mm larger than the width of the metal ring gasket (5) after the fastener (6) is screwed, and a distance not larger than 1mm is reserved between the outer diameter of the HDPE flange (4) and the inner diameter of the metal ring gasket (5).
8. A high pressure pipe liner HDPE flanged connection according to any of claims 1-7, characterized in that: the metal ring gasket (5) is oval or octagonal, is tightly attached to a sealing groove of the carbon steel flange (3), and is also tightly attached to the HDPE flange (4) which is deformed under pressure.
9. A high pressure pipe liner HDPE flange connection according to claim 2, characterized in that: the air release port is 2-3 mm.
10. A high-pressure pipe liner HDPE flange connection device according to claim 4, characterized in that: the thread loosening ring is externally connected with an air release valve or connected by a screwed plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221525929.2U CN218294887U (en) | 2022-06-17 | 2022-06-17 | High pressure pipeline inside lining HDPE flange connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221525929.2U CN218294887U (en) | 2022-06-17 | 2022-06-17 | High pressure pipeline inside lining HDPE flange connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218294887U true CN218294887U (en) | 2023-01-13 |
Family
ID=84787079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221525929.2U Active CN218294887U (en) | 2022-06-17 | 2022-06-17 | High pressure pipeline inside lining HDPE flange connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218294887U (en) |
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2022
- 2022-06-17 CN CN202221525929.2U patent/CN218294887U/en active Active
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